Mechanic&#39;s furnace.



PAUL B. FLAIVIM, OF NORTH CHICAGO, ILLINOIS.

MECHANIGS FURNACE.

Speccation cf Letters Patent.

Application filed December 8, 1909.

Patented J une 14, 1910.

Serial No. 531,985.

To all whom it may concern:

Be it kno-wn that I, PAUL R. FLAMM, a citizen of the United States, residing at North Chicago, county of Lake, and State of Illinois, have invented certain new and useful Improvements in Mechanics Furnaces, of which the following is a specificat-ion.

My invention relates to mechanics? furnaces and more specifically to that class thereof which are designed particularly for heating soldering irons.

' The object of my invention is the provision of a furnace of the character mentioned which will be so designed as to be adapted to automatically regulate the flow of fuel to the burner thereof.

More explicitly, it is my object to provide a furnace in which will be embodied means whereby, upon the proper arrangement of an iron thereon, the fuel fiow through the device to the burner thereof will be such as will be adapted to support a substantial heating ame at the latter; and whereby, upon the removal of the iron therefrom, the fiow of fuel will be automatically restricted so that only a pilot ame will be supported thereby at the burner.

A further object is the provision of a furnace of the character mentioned which will be efficient in operation and strong, durable and economical in construction.

Other objects will appear hereinafter.

With these objects in view my invention consists in a mechanics furnace characterized as above mentioned and in certain details of construction and arrangement of parts all as will be hereinafter fully described and particularly pointed out in the appended claims.

My invention will be more readily understood by reference to the accompanying drawings forming a part of this specification, and in which,

Figure 1 is a side elevation of my device, Fig. 2 is an enlarged central vertical section thereof, and Fig. 3 is a transverse section taken on line of Fig. 2.

Referring now to the drawings 1 indicates the fuel feed or supply pipe, to the forward flanged end of which is connected, as at a union 2, the rearward extremity of a tubular connecting member 3. Having its forward end portion slidably mounted in the forward reduced end of the member 3 is a tubular valve 4. The head 5 of said valve is beveled or conically formed and is adapted to be snugly received in a seat 6 formed for the reception thereof in the forward extremity of the supply pipe 1. A helical compression spring 7 arranged in the annular chamber 8 formed in the member 3, the respective extremities thereof abutting the forward wall of said chamber and the valve head 5, is evidently adapted to normally hold the latter in seating posit-ion. Provided in the valve head 5 is a central longitudinally extending comparatively line or minute passage 9. Provided in the comprising walls of the valve 4 adjacent the head 5 is a plurality of radially extending perforations 10 whereby communication is established between the chamber 8 and the interior of said valve. Arranged in the forward extremity of said valve is a nozzle 11.

Having its rearward extremity tightly embracing the reduced forward end portion of the member 3, the same projecting forwardly therefrom in alinement therewith and being supported upon and positioned between brackets 12, is a. burner 13. Said burner at its rearward end is provided with an enlargement 14 which constitutes a mixing chamber, said enlargement being provided in its rearward side with a plurality of air inlets 15. Rotatably mounted upon said rearward side of the enlargement 15 is a snugly fitting sleeve or annular plate 16. The latter is provided with openings 17 adapted to register with the openings 15. With the provision of said member 16, the size of the air inlets may be readily regulated, and whereby a combustible mixture of any desired proportions of air and gas may be obtained.

The brackets 12 project above the burner 13, the upper ends thereof being disposed inwardly and being angularly formed, as shown in Fig. 3, so as to adapt the same to.

support a soldering iron point thereon di- 100 rectly above the gas escapement openings 18 in the upper side of the forward end portion of the burner.

Pivoted as at 19 between depending ears 20 is a bell crank lever 21. One arm 22 of 105 said lever projects upwardly through a slot 23 provided in the under side of said mixing chamber and engages a notch 24 provided in the forward end of the valve 4. With such arrangement, by depressing the for- 110 wardly projecting arm 24: 'of said lever, said valve will evidently be drawn forwardly in its bearing to open wide the gas passage controlled thereby. Loosely mounted substantially centrally in the burner 13 is a vertically disposed pin 26, the lower eX- tremity of which is supported upon the forward end of the lever arm 25. Said pin is of such length as to be adapted, when a soldering iron is arranged in the supporting brackets 12, to be engaged and depressed thereby, as clearly shown in Fig. 3. With such construction therefor, upon the arrangement of an iron above the burner for heating, the valve 4, through the medium of the pin 26 and the lever 21, will be drawn forwardly to open position, thereby preventing of the unrestricted passage of gas to the burner to support a substantial liame at the latter. Upon removal of the iron, said valve, lever, and presser pin will be turned to initial position by the spring 7 When said valve is in initial or seated position, the supply of gas to the burner will be practically shut 0H, enough gas being, however, permitted to escape through the passage 9 to support a pilot flame at the urner. Hence it will be seen that when the furnace is in use, the iame issuing therefrom will be of a considerable heating magnitude, and when not in use the flame supported will be diminished to practically nothing. |Ihe economical advantage of this arrangement is evident.

While I have shown what I deem to be the preferable form of my device I do not wish to be limited theretov as there might be various changes made in the details of construction and the arrangement of parts without departing from the spirit of the invention comprehended within the scope of the appended claims. And although I have designed my device with special reference to the heating of soldering irons the same may be used in any other connection or for heating any other device or article to which it is applicable. f

I-Iaving described my invention what I claim as new and desire to secure by Letters Patent is:

l. In a device of the class described, the combination with a burner, of a gas chamber connected therewith; a supply pipe leading to said gas chamber; a tubular valve leading to said burner and operating in said gas chamber, the said valve comprising a tube having a valve head seated to close said supply pipe, there being a minute opening through said head into the interior of the tube and a radial opening in the wall of said tube; a spring normally holding said valve to its seat; a sup ort for a tool 1n operative relation with said burner and means, operable by a tool on said support for moving said valve from its seat, substantially as described.

2. In a devicef of the class described, the combination with a burner, of a gas chamber connected therewith; a supply pipe leading to said gas chamber; a tubular valve leading to said burner and operating in said gas chamber, the said valve comprising a tube having a valve head seated to close said supply pipe, there being a minute opening through said head into the interior of the tube and a radial opening in the wall of said tube; a discharge nozzle at the discharge end of said tube; a spring normally holding said valve to its seat; a support for a tool in operative relation with said burner; and means, operable by a tool on said support, for moving said valve from its seat, substantially as described. Y

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PAUL R. FLAMM.

Vitnesses ALBERT MEGHAM,

F. W. Coon. 

